ISD1810SY

Overview

The ISD1810SY is a single-chip, single-message voice record/playback device from the ISD1800 series, manufactured by Winbond Technology Corporation. It provides 6 to 16 seconds of recording duration using patented multilevel storage technology that stores voice signals directly in nonvolatile memory cells without digital compression. The CMOS device integrates an on-chip oscillator, microphone preamplifier with automatic gain control, anti-aliasing filter, smoothing filter, and an 8Ω speaker driver. It operates on a single +3V power supply and features automatic power-down mode with typical standby current of 0.5µA. Recordings are retained for up to 100 years with 100,000 re-record cycles.

Feature Summary

• Patented ChipCorder® technology enables natural voice reproduction by storing audio signals directly in nonvolatile memory cells without synthetic digital effects.
• Integrated analog front-end includes microphone preamplifier, automatic gain control, active anti-aliasing filter, and smoothing filter for high-quality audio capture and playback.
• Built-in 8Ω speaker driver allows direct connection to loudspeakers without external coupling capacitors when using differential SP+ and SP- outputs.
• Automatic power-down circuitry transitions the device to low-power standby mode immediately after record or playback completion, minimizing energy consumption.

Applications

• Single-message voice prompts in industrial equipment and appliances
• Educational toys and novelty items requiring recorded speech
• Security systems and alarm devices with custom voice alerts
• Automotive interior announcements and warning chimes

Procurement Notes

Verify the manufacturer origin as Winbond Technology Corporation, not Nuvoton, based on the provided datasheet documentation. Confirm the package type corresponds to the 'S' suffix for 28-pin SOIC format. Ensure the ordering number matches I1810S for volume production availability. Check for preliminary status indicators in older revisions if sourcing legacy stock.

Selection Notes

Select the ISD1810 variant over ISD1806 when longer message durations between 8 and 16 seconds are required. Adjust the ROSC resistor value to set the specific sample rate and corresponding playback duration within the supported range. Consider the 28-pin SOIC package for surface-mount assembly requirements. Verify power supply stability within the 2.7V to 4.5V operating range for reliable performance.

Part Context

The ISD1810 belongs to the ISD1800 series of single-chip voice recorders developed by Winbond. This series utilizes proprietary multilevel storage technology to achieve high-density voice storage in a compact CMOS package. The ISD1810 specifically offers extended duration capabilities compared to the shorter ISD1806 model, catering to applications needing longer single-message playback times.

Replacement Considerations

Direct substitutes include other ISD1800 series variants such as ISD1806 for shorter duration needs. Cross-reference pin compatibility and package dimensions when replacing with similar single-message recorders from different manufacturers. Verify memory retention specifications and power consumption characteristics match application requirements.